Browns RB Richardson to miss preseason following knee surgery

Browns rookie running back Trent Richardson is expected to miss at least the preseason following arthroscopic knee surgery Thursday.

Richardson traveled to Pensacola, Fla. to have swelling in his left knee examined, and had the procedure done by Dr. James Andrews.

"Trent Richardson underwent a successful routine arthroscopic procedure today on his left knee," Browns coach Pat Shurmur said in a statement. "We anticipate that Trent will make a speedy recovery, and we are hopeful that he will be ready for our Week One game against Philadelphia."

The small particle in Richardson's knee, which has caused swelling, was found after an MRI.

The injury is reportedly not related to the torn meniscus he had while playing at Alabama during the BCS championship game victory over LSU. Richardson had surgery for that injury in February.